Boiler alarm



March 19, 1929. h T. DIBLASI ET AL 1,706,217

BOILER ALARM Filed Feb. 1, .1928

.2 INVENTOR. lndar'opt/ Blawo Patented Mar. 19, 1929.

UNITED STATES TINDARO DI BLASI AND VITO LAMORTE, OF NEW YORK, N. Y.

BOILER ALARM.

Application filed February The present invention relates to alarm apparatus operable upon an increased water level in a container orthe like by reason of an abnormal pressure therein, and more specifically relates to an'alarm apparatus for boilers and the like used in heating systems.

In heating boilers, as for example, for apartment or domestic houses, which are generally shut off during the night by reason of the decreased load demand, there is a possibility that due to a leaking water feed connection with the city water main, or due to the boiler drafts being inadvertently left open, a pressure will develop within the boiler which may have serious results. It is accordingly the main object of the invention to provide an alarm devicewhich is operable to sound an alarm on increase of pressure in a heating boiler or the like whereby such an abnormal condition within the boiler may be remedied.

A further object is to provide an alarm device of the above described character which is operable upon increase of pressure within the boiler acting to force the water therein above its normal level.

A further object of our invention is to provide an alarm device for heating boilers or the like, which is fool-proof in operation, simple and practical in construction, and durable in use.

Other objects will be'in part obvious from the annexed drawings and in part hereinafter indicated in connection therewith by the following analysis of the invention.

' This invention accordingly consist-s in the features of construction, combination of parts and in the unique relation of the mem bers and in the relative proportioning and disposition thereof, all as more completely" outlined herein.

To enable others skilled in the art to fully comprehend the underlying features thereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form of the invention have been annexed as part of this disclosure, and in such drawings, like characters of reference denote corresponding parts throughou'tall of the views, of which Fig. 1 is an elevation of the alarm device as is necessaryto understand the invention;

Fig. 2 isa top plan of the device shown in Fig. 1;

'1, 1928. Serial N0. 251,120.

Fig. 3 is a section looking along lines 33 of Fig. 2; and

Fig. 4 is a schematic representation of the device applied to a heating boiler of any conventional type.

Referring now to the drawings, numeral designates an upright pipe threaded into a heating boiler A and extending below the normal water level therein and terminating at itsupper end in a laterally directed elbow 11. A tube 12 is secured to said elbow by means of a nipple 13 and is threaded into the bonnet of a globe valve 14 having an operating handle 15. At the discharge side of the valve 14, we provide a nozzle tube 16 having its relatively outer end directed downwardly.

Apanel board 20, preferably of non-conducting and heat resisting material, is clamped on the upright pipe 10 by means of clamp arms 21, which ext-end from a plate 22 fixedly secured to the said panel board b means of bolts 23. A wingnut 24 is provided by which the clamp arms 21 may be separated to permit an adjustment of the height of the panel board with respect to the pipe 10.

A thru bolt 25 extends thru the panel 20 upon which is mounted a loose bushing 26 suitably spaced from the panel by any desired means. e secure a lever 27 to the loose bushing 26 as by soldering or welding, the said lever extending in a direction parallel to the longitudinal axis of the panel board and being adapted for free pivotal movement about thethru bolt 25.

"At one end of the lever 27, we secure a bucket or container 28 which is arranged below the outlet of nozzle 16 hereinbefore described. The other end of lever 27 is bent upon itself as at 30 to hold a Weight 31, which serves to pivot the lever 27 in a clockwise direction, assuming that the bucket 28 is empty. The lever is limited in such movement by a bracket 32 (see Fig. 3) which extends from and is fixedly secured to the panel 20 as by bolts 33 and 33. The bottom of the bracket 32 is provided with an insulating block 3 and the portion of the bracket adjacent the panel board, andthe bolts 33 and 33, are preferably insulated from the panel board. The bracket 32 and bolt 33 are of conducting material, and we secure a terminal clip 36 to the end of bolt 33 by a wing nut 37 the clip forming one posed an alarm device 40 such as a bell or the like. The other terminal 36 is secured to thru bolt 25 by a wing nut 41, and the cir cuit includes bolt 33, bracket 32, lever 27, bushing 26, and thru bolt 25.

The operation is briefly as follows. As hereinbefore mentioned, heating boilers for apartment houses generally receive during the day time the attention of a fireman or janitor. During the night, by reason of the demand upon the boilers being lessened, the boilers are shutoff and receive no attention during these hours. According to the present device, the valve 14 is maintained closed during the day time or when the boiler is receiving the LliZiGIltlOll of a fireman or janitor. At night, the valve is opened, and if the pressure in the boiler rises due either to the drafts being inadvertently left open, or by reason of a leaking feed water connection with the city main which may cause the boiler to become flooded, the excessive steam in'essure generated will force the water in the boiler up the pipe 10 past the open valve to be discharged thru the nozzle 16 into bucket 28. The weight of the Water in said bucket overcomes the urge of weight 31 and causes lever 27 to swing in a counterclockwise direction and against the upper portion of the bracket 32, to complete an electric circuit thru terminal. 37, bolt 33, bracket 32, lever 27, bushing 26, thru bolt 25, terminal 37, and wiring 38, to cause an audible signal to be given by the bell 4L0. The alarm device may be suitably situated in the janitors quarters, who will thus be advised that an abnormal pressure condition exists in the boiler which should be immediately remedicd. It will be apparent thatany alarm device such as a signal light may be substituted. for the bell l0 as conditions require.

The device as above described will also be useful in indicating low water levels in the boiler. The valve 14, when opened, will permit steam to be delivered thru nozzle 16 if the water in the boiler is below the level of the lowermost portion of the pipe 10, and thus indicate that feed water should be supplied.

lVithout further analysis the foregoing will so fully reveal the gist of this invention that others can by applying current knowl edge readily adapt it for various applications without. omitting certain features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention, and therefore such adaptations should and are intended to be comprehended within the [meaning and range of equivalency of the following claims.

lVe claim:

1. In an alarm device of the character described, a pipe adapted to extend into a heating boiler and below the normal water level therein, a nozzle extending from said pipe, a normally open alarm circuit, and means to close the alarm circuit upon flow of water thru the pipe and nozzle due to excessive pressure in or flooding of the boiler.

2. In an alarm device of the character de scribed, a pipe adapted to extend into a heating boiler and below the normal water level therein, a nozzle extending from said pipe, an alarm circuit, a lever normally maintaining said alarm circuit open, and means to actuate the lever into circuit closing relation upon excessive pressure in or flooding of, the boiler causing flow of water thru the pipe and nozzle.

3. In an alarm device of the character described, a pipe adapted to extend into a heating boiler and below the normal water level therein, a nozzle extending from said pipe, a member carried by said pipe, a lever pivotally mounted from said member, an alarm circuit associated with said lever and normally maintained open, and a bucket carried by said lever adapted to receive water from said nozzle and pipe upon excessive pressure in or flooding of the boiler thereby to actuate said lever and close said alarm circuit.

4. In a device of the character described, a pipe adapted to extend into a heating boilor and below the water level therein, a laterally directed nozzle at the upper end of said pipe, a valve between said pipe and nozzle, a panel fixedly secured to said pie, a lever of conducting material pivota ly mounted. from said panel, a bracket of conducting material extending from said panel to limit the pivotal movement of said lever, a normally open alarm circuit including said. bracket and lever, a weight at one end of said lever adapted to urge the lever into open circuit relation with said bracket, and a bucket at the other end of the lever to receive water from said pipe and nozzle upon ex cessive pressure in the boiler and operative to actuate said lever into engagement with the bracket, thereby to close said alarm circuit.

5. In combination with a system heating boiler, a pipe extending into the boiler and below the normal water level therein, a laterally disposed nozzle arranged at the up per end of the pipe, a normally open alarm circuit, and means to receive water from said pipe and nozzle upon excessive pressure in the boiler or upon flooding of the boiler, thereby to close the alarm circuit.

6. In combination with a system heating boiler, a pipe extending into the boiler and below the normal water level therein, a laterally disposed nozzle arranged at the upper end of the pipe, a normally open alarm circuit, a lever, means disposed at one end of said lever normally maintaining said circuit open, and means at the other end of said ill lever adapted to receive water from said said member, an alarm circuit associated pipe and nozzle upon excessive pressure in with said lever and normally maintained or flooding of the boiler, and operative to opened, and a bucket carried by said lever close said alarm circuit. adapted to receive Water from said nozzle 7. In combination with a system heating upon excessive pressure in or flooding of 15 boiler, a pipe extending into the boiler and the boiler thereby to close said alarm circuit. below the normal Water level therein, a lat- Signed at New York, New York, this 80th erally disposed nozzle arranged at the upper day of January, 1928. end of the pipe, a member carried by said TINDARO DI BLASI. 10 pipe, a lever pivotally mounted parallel to VITO LAMORTE. 

